Apex domains cannot have CNAME records.
Question and response
Question
dig mem.gov.do. NS
Answer
mem.gov.do. 5 NS elma.ns.cloudflare.com.
mem.gov.do. 5 NS plato.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0